在php中使用curl库编写https接口，具体方法如下：

function fetch_page($site,$url,$params=false)
{
$ch = curl_init();
$cookieFile = $site . '_cookiejar.txt';
curl_setopt($ch, CURLOPT_COOKIEJAR, $cookieFile);
curl_setopt($ch, CURLOPT_COOKIEFILE,$cookieFile);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_HTTPGET, true);
curl_setopt($ch, CURLOPT_TIMEOUT, 4);
if($params)
curl_setopt($ch, CURLOPT_POSTFIELDS, $params);
curl_setopt($ch,CURLOPT_USERAGENT,'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.3) Gecko/2008092417 Firefox/3.0.3');
curl_setopt($ch, CURLOPT_URL,$url);
$result = curl_exec($ch);
return $result;
}